Pressure sensor device having temperature sensor

Abstract

A pressure sensor device having a temperature sensor includes a pressure sensor, a temperature sensor, a sensor casing for accommodating the pressure sensor and a connector pin for electrically connecting the pressure sensor and an outside circuit, and a port mounted on the sensor casing and having a pressure introduction port for introducing a measuring object to the pressure sensor. The temperature sensor is disposed in the pressure introduction port, and electrically connects to the connector pin through a lead wire. The lead wire with the temperature sensor is supported by a connection portion disposed between the connector pin and the lead wire. The lead wire has a buffer disposed between the lead wire and a part of the pressure introduction port for reducing a vibration of both the temperature sensor and the lead wire.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is based on Japanese Patent Applications No. 2002-308982 filed on Oct. 23, 2002, and No. 2003-75019 filed on Mar. 19, 2003, the disclosures of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a pressure sensor device for detecting pressure of a measuring object, and more particularly to a pressure sensor device having a temperature sensor for detecting both pressure and temperature of the measuring object.BACKGROUND OF THE INVENTION[0003]A pressure sensor device having a temperature sensor, i.e., the pressure sensor device integrated with the temperature sensor, is, for example, used for a vehicle. The device detects both pressure and temperature of intake air as a measuring object in an intake manifold of the vehicle, so that the device outputs a measurement signal to a controller. The controller calculates and outputs a control signal to an engine of the vehicle so t...

AI Technical Summary

Benefits of technology

[0007]A pressure sensor device having a temperature sensor includes a pressure sensor for detecting pressure of a measuring object, a temperature sensor for detecting temperature of the measuring object, a sensor casing for accommodating the pressure sensor and a connector pin, which electrically connects the pressure sensor and an outside circuit, a port mounted on the sensor casing and having a pressure introduction port for introducing the measuring object to the pressure sensor disposed in the sensor casing, and a vibration reduction means for reducing a vibration of both the temperature sensor and the lead wire. The temperature sensor is disposed in the pressure introduction port, and electrically connects to the connector pin through a lead wire. Both the temperature sensor and the lead wire are supported by a connection portion, which is disposed between the connector pin and the lead wire.

[0008]In the above device, the vibration of the lead wire with the temperature sensor is reduced by the vibration reduction means even when a vibration is applied to the device. Thus, endurance of the device is improved.

[0010]Preferably, the pressure introduction port includes a partition plate for separating at least a part of the pressure introduction port into two parts. The partition is disposed along with an introducing direction of the measuring object. One part of the pressure introduction port is a temperature sensor chamber for accommodating the temperature sensor. In this case, the buffer is easily inserted between the lead wire and a part of the pressure introduction port.

[0011]Preferably, the vibration reduction means is provided such that at least one of the temperature sensor or the lead wire is insert-molded into the port so as to reduce the vibration. More preferably, both the sensor casing and the port provide a pressure chamber for introducing the measuring object therein, and the lead wire and the connector pin are connected at a connection portion, which is disposed outside the pressure chamber. In this case, at least one of the lead wire or the temperature sensor is integrated into the port so that both the lead wire and the temperature sensor are preliminarily positioned at a predetermined position. Therefore, the lead wire and the connector pin can be connected at the outside of the pressure chamber, so that the connection portion is not contaminated. Thus, a protection for the connection portion can be formed of epoxy resin or silicon resin, which has less chemical resistance but less expensive.

[0012]Further, a pressure sensor device having a temperature sensor includes a pressure sensor, a temperature sensor attached to a lead wire, a casing for accommodating the pressure sensor and a connector pin for connecting both the pressure sensor and the temperature sensor to an outside circuit, a passage disposed in the casing for introducing a measuring object to the pressure sensor, and a vibration reduction means for reducing a vibration of the lead wire with the temperature sensor. The lead wire is supported by a connection portion between the connector pin and the lead wire so that the lead wire is protruded in the port.

[0013]In the above device, the vibration of the lead wire with the temperature sensor is reduced by the vibration reduction means even when a vibration is applied to the device. Thus, endurance of the device is improved.

Problems solved by technology

Moreover, even when a contamination contaminated into the pressure introduction port, the contamination is discharged through the buffer together with the measuring object flowing therethrough.

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